<template>
  <div class="login_container">
    <!-- 登录盒子 -->
    <div class="login_box">
      <!-- 头像盒子 -->
      <div class="tx_box">
        <img src="@/assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" class="login_form" :rules="loginFormRules">
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button @click="resetForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: "admin",
        password: "123456"
      },
      loginFormRules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: "blur" }
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          { min: 6, max: 10, message: "长度在 6 到 10 个字符", trigger: "blur" }
        ]
      }
    };
  },
  methods: {
    resetForm() {
      // 获取el-form实例
      // 通过el-form组件实例 调用resetFields重置表单的方法
      // 怎么才能获得el-form实例呢？？？
      // 通过 this.$refs['loginFormRef'] 得到el-form组件实例对象
      this.$refs["loginFormRef"].resetFields();
    },
    login() {
      // 预校验
      this.$refs.loginFormRef.validate(async vali => {
        if (!vali) return;
        // 发送登录请求
        let { data: res } = await this.$http.post("login",
          this.loginForm
        );
        if(res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        window.sessionStorage.setItem('token',res.data.token)
        // 跳转到home
        this.$router.push('/home')
      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
  position: relative;
  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    .tx_box {
      width: 130px;
      height: 130px;
      position: absolute;
      border: 1px solid #eee;
      border-radius: 50%;
      background-color: #fff;
      box-shadow: 0 0 10px #ddd;
      padding: 10px;
      left: 50%;
      transform: translate(-50%, -50%);
      img {
        height: 100%;
        width: 100%;
        border-radius: 50%;
      }
    }

    .login_form {
      box-sizing: border-box;
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 0 20px;
      .btns {
        display: flex;
        justify-content: flex-end;
      }
    }
  }
}
</style>